What is "prochilodontidae"

The Prochilodontidae, or flannel-mouthed characins, are a small family of fishes found primarily in the northern half of South America, south to Paraguay and northern Argentina. This family is closely related to the Curimatidae, and in the past they were included in Characidae.

These fish have fleshy lips with rows of small teeth; their lips are able to be extended into a sucking disc. The largest species reach up to in length, and live in huge schools, making them a popular food fish. They travel upriver to spawn, and make audible grunting noises that have been described as resembling the sound of a motorbike.